I understand t.b.'s reasoning on why we should keep both the physics and mathematical-physics tags, but I notice that their wikis, and more specifically their excerpts, are sufficiently similar that ...

The tag for mobius-function currently reads "questions on the Möbius function $μ(n)$, an arithmetic function used in number theory", which is true, but it's also a specific case of Möbius function in ...

Currently, there exist a tag divergence, about which I'd like to know your opinion:
the tag has no usage guidance and no tag wiki. This means that users cannot know whether this tag is dedicated to "...

I voted to close this question, with the justification that it is about mathematical publishing, not mathematics itself, and it would be better suited to academia.SE. This seems consistent with the ...

Recently there was a discussion about removing previously created synonym of some tags, so that the two tags are separate again. (And we could probably find several related discussion in the past.)
...

Currently, fourier-series has 2202 questions and 101 followers, while trigonometric-series has only 324 questions and 9 followers. I suggest merging the two, but also keeping "trigonometric-series" as ...

We have a almost-everywhere tag for measure-theory. Do we need "almost-sure" tag for probability space? The later is a particular case of the former, but the later concerns a vast variety of topics ...

Given that the only difference between a stationary point and a critical point are that critical points include points whose derivative does not exist and the endpoints of the region and that critical ...

Why does lotteries exist?
It doesn't help the answerer know anything about the question. You can't really be an expert in math questions about lotteries. It doesn't even have a tag description.
Note:...

As I was tagging this question yesterday, I added tags, and I saw this:
So I thought the tags had no info, and noted it in a "BTW" sentence at the end of the question. I removed it a while ago as per ...